package org.zhangxiao.paladin2.common.util;

import org.springframework.beans.BeansException;
import org.springframework.boot.system.ApplicationHome;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

import java.io.IOException;

@Component
public class SpringUtils implements ApplicationContextAware {

    private static ApplicationContext applicationContext;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        if (SpringUtils.applicationContext == null) {
            SpringUtils.applicationContext = applicationContext;
        }
        System.out.println("---------------SpringUtils------------------------------------------------------");
        System.out.println("ApplicationContext配置成功,在普通类可以通过调用SpringUtils.getAppContext()获取applicationContext对象");
        System.out.println("applicationContext=" + SpringUtils.applicationContext);
        System.out.println("---------------------------------------------------------------------");
    }

    //获取applicationContext
    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

    //通过name获取 Bean.
    public static Object getBean(String name) {
        return getApplicationContext().getBean(name);
    }

    //通过class获取Bean.
    public static <T> T getBean(Class<T> clazz) {
        return getApplicationContext().getBean(clazz);
    }

    //通过name,以及Clazz返回指定的Bean
    public static <T> T getBean(String name, Class<T> clazz) {
        return getApplicationContext().getBean(name, clazz);
    }

    public static String getJarDir() {
        ApplicationHome home = new ApplicationHome(SpringUtils.class);
        try {
            return home.getDir().getCanonicalPath();
        } catch (IOException e) {
            return null;
        }
    }

    public static String getStaticPath(String webPath) {
        return getJarDir() + "/static" + webPath;
    }
}
